Sound film



June 25, 1935.

R.V SCHMIDT 2,005,847

SOUND FILM Filed Jan. v28, 1933 l sound/rack iff/ann `o/ azyzajrol/ePatented June 25, 1935 UNITED STATE-S PATENT OFFICE SOUND FILM 'Richardschmidt, Dessau in Anhalt, Germany,

` assignor to Agfa Ansco Corporation, Binghamton, N. Y., a corporationof New York Application January 28, 1933, Serial No. 654:,089y

In Germany January 30, 1932 l 2 Claims.

My present invention relates to sound recording ande more particularlyto sound recording on lenticular film.

In order to provide a lenticular cinematograph "I'llm with a sound trackproduced `mechanically,

in the operation of producing the lenticular elements on the film.Another method consists in making the sound track on that face of thefilm which does not carry the lenticular elements; the gelatin havingbeen removed for the purpose, or omitted in the manufacture.

According to this invention I have found that Sounds can be recordedmechanically on a lenticular Illmby means of a stylus and cutting thelenticular' elements sothat the sound groove forms a zigzag line, thatis `to say there is no preparation of the nlm or particular mode of'making the film, to fit it for receiving the sound track. It has beenfound that the lenticular elements do not impair the process ofrecording sound mechanically inyform of a zigzag line and that thereproduction of the sound record thus' produced is not disturbed byextraneous noises.

As according to my invention any lenticular film is applicable forreceiving sound records mechanically the invention is a considerableimprovement especially in connection with colored sound films made bythe well-known Berthon 5 process as disclosed in U. S. Patent No.992,151, granted May 16, 1911.

In the accompanying drawing there is illustrated a lenticular lm bearinga sound groove 10 according to this invention.

Fig. 1 shows the face of the film which is provided with the lenticularelements and the zigzag sound groove.

Flg.2 shows a section through a lenticular film and the emulsion layer,the'i-support being em- 15 bossed with the lenticular elements and thesound groove being engraved on this embossed surface.

What I claim is:

' l. A lenticular film bearing a mechanical sound track 1n form of azigzag sound groove within 20 vthe lenticular elements.

2. A lenticular filmbearing a mechanical sound track in form of a zigzagsound groove within the lenticular elements the sound groove in generalbeing parallel with the lenticular elements. 25

RICHARD scmnn'r.

